Many of the cast attended, and Rupert Grint and Emma Watson talked about the upcoming Goblet of Fire movie which they are currently filming.

Rupert told us: “We’re about halfway through filming now, it’s going really well. In this one you’ve got the Yule Ball, where we all have to find partners so that will be quite interesting. And I have to wear these horrible dress robes for the ball so I’m not really looking forward to that.”

Emma told Newsround that she was learning new skills for Hermione for the next movie – learning to dance! “And it’s not just normal dancing, I’m talking the tango, the foxtrot, waltzing, it’s quite impressive,” she laughed.

TLC also attended tonights party and will have our own report and pictures soon!